President-elect Donald Trump’s proposal for a $1 trillion infrastructure fix has triggered bipartisan worries about its financing — but the biggest immediate bump in the road is the lack of specifics, according to Politico.

"Look, we don't have the details," GOP House Transportation chair Bill Shuster told Politico. "We're working very closely with his transition team and hopefully with the new department head to figure out how we're going to pay for it. It's got to be fiscally responsible."

South Dakota GOP Sen. John Thune, who heads the Commerce Committee, noted the trilllion-dollar price tag is "a big number," but thinks a tax overhaul could finance it.

"I think it's going to come down to figuring out just actually what's achievable," he told Politico.

West Virginia GOP Sen. Shelley Moore Capito told Politico the proposal is "critical, something that could draw us together," but conceded Congress would be unlikely to pass anything if it's "not paid for."

"To just add it to the national debt, I don’t think President-elect Trump or members of the Republican conference would support that," North Carolina GOP Rep. Mark Meadows told Politico.

Democrats on board with the infrastructure fix include New York Rep. Jose Serrano, who told Politico: "The country needs it," saying Trump “should be telling us how he’s going to get it through a Congress that doesn’t want to spend $1.50 on anything."

Banker Steve Mnuchin told Politico the transition team is "looking at the creation of an infrastructure bank" — an idea that went nowhere when proposed by President Barack Obama, according to Politico.

Trump’s campaign also called for setting up "public-private partnerships" to encourage private investors to put their money into infrastructure, Politio reported.

In the end, Republicans are depending on Trump to sell the plan, whatever it is, Politico reported.

"His business acumen is going to give him a better handle on the fiscal reality than we’ve had heretofore," Arizona GOP Rep. Trent Franks told Politico.

President-elect Donald Trump's proposal for a $1 trillion infrastructure fix has triggered bipartisan worries about its financing -but the biggest immediate bump in the road is the lack of specifics, according to Politico.